An extended aeration activated sludge system is to be designed to treat its sanitary wastewater to meet effluent COD and NH4-N concentration of 25 mg/L and 0.5 mg/L, respectively. The characteristics of the raw wastewater and the design conditions are as follows: 6500 m2/day 250 mg TKN COD TP 40 mg/L 5 mg 40 days Sludge age Alkalinity 140 as CaCO3 MVSS 5000 mg/L MWSS:MLLSS 0.85 SVI 200 Assume alkalinity used for nitrification=7.14 g CaCO3/g NH4-N Use the kinetic coefficients in the text book Table 8.14 Determine the following: Amount of sludge production in kg/day. Volume of the aeration tank in m?. Oxygen demand in kg/h. iv. How much alkalinity needs to be added in kg/day NaHCO3 if the sodium bicarbonate has a purity of 95%? The sludge waste flowrate. Qwand QR in m3/day assuming that effluent suspended solids is ignored. i. 11. V. An extended aeration activated sludge system is to be designed to treat its sanitary wastewater to meet effluent COD and NH4-N concentration of 25 mg/L and 0.5 mg/L, respectively. The characteristics of the raw wastewater and the design conditions are as follows: 6500 m2/day 250 mg TKN COD TP 40 mg/L 5 mg 40 days Sludge age Alkalinity 140 as CaCO3 MVSS 5000 mg/L MWSS:MLLSS 0.85 SVI 200 Assume alkalinity used for nitrification=7.14 g CaCO3/g NH4-N Use the kinetic coefficients in the text book Table 8.14 Determine the following: Amount of sludge production in kg/day. Volume of the aeration tank in m?. Oxygen demand in kg/h. iv. How much alkalinity needs to be added in kg/day NaHCO3 if the sodium bicarbonate has a purity of 95%? The sludge waste flowrate. Qwand QR in m3/day assuming that effluent suspended solids is ignored. i. 11. V